Michael Harhay is an Assistant Professor of Epidemiology and Medicine (Pulmonary and Critical Care) and the Director of the NIH- and PCORI-funded Clinical Trials Methods and Outcomes Lab at the University of Pennsylvania Perelman School of Medicine. He is also an Honorary Research Fellow at the Institute of Clinical Trials and Methodology at University College London. The primary focus of his current research is the development and application of causal inference and Bayesian statistical methods to improve pragmatic and cluster-randomized trials, particularly those embedded in health systems and for patients with critical and severe illnesses. Michael is involved in a wide range of international research activities, including randomized trial data safety and monitoring boards, societal and trial steering committees, and research consortia. He currently serves as a Deputy Editor of the American Journal of Respiratory and Critical Care Medicine.